We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

General Relativity, Einstein’s revolutionary theory of gravity, reinterprets gravitational interactions as phenomena emerging from the curvature of spacetime rather than as forces in the traditional ...

Quantum mechanics is rich with paradoxes and contradictions. It describes a microscopic world in which particles exist in a ...

Albert Einstein won the 1921 Nobel Prize in Physics, but not for relativity—the theory that made him famous. This article ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human ...

General Relativity, Einstein’s seminal theory of gravitation, remains a pillar of modern physics by describing gravity as the curvature of spacetime. Nonetheless, persistent questions—ranging from the ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of ...

A new software package detailed by Chinese scientists promises to tell what time it is on the moon, accounting for effects of ...

"A three-body problem is extremely complicated. Now we're dealing with four: the sun, Earth, the moon and Mars. The heavy lifting was more challenging than I initially thought." When you purchase ...